You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.2 KiB
43 lines
1.2 KiB
// Copyright 2017 PingCAP, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package systimemon
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/pingcap/tidb/util/logutil"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
// StartMonitor calls systimeErrHandler if system time jump backward.
|
|
func StartMonitor(now func() time.Time, systimeErrHandler func(), successCallback func()) {
|
|
logutil.BgLogger().Info("start system time monitor")
|
|
tick := time.NewTicker(100 * time.Millisecond)
|
|
defer tick.Stop()
|
|
tickCount := 0
|
|
for {
|
|
last := now().UnixNano()
|
|
<-tick.C
|
|
if now().UnixNano() < last {
|
|
logutil.BgLogger().Error("system time jump backward", zap.Int64("last", last))
|
|
systimeErrHandler()
|
|
}
|
|
// call sucessCallback per second.
|
|
tickCount++
|
|
if tickCount >= 10 {
|
|
tickCount = 0
|
|
successCallback()
|
|
}
|
|
}
|
|
}
|
|
|